Chair-support structure for mining-machine drills.



F. FUNK. CHAIR SUPPORT STRUCTURE FOR MINING MACHINE DRILLS.

APPLICATION FILED APR.19.I915.

Patented Apr. 17, 1917.

FIRED FUNK, OF CHICAGO HEIGHTS, ILLINOIS,

FACTURING COMPANY, OF CHICAGO ILLINOIS.

ASSIGNOR T0 FUNK BROTHERS MANU- IIEIGII'IS, ILLINOIS, A CORPORATION OF CHAIR-SUPPORT STRUCTURE FOR MINING-MACHINE DIR/ILLS.

Specification of Letters Patent.

Patented Apr. 1?, 191W.

Application filed April 19, 1915. Serial No. 22,385.

To all whom it may concern:

Be it known that I, FRED FUNK, a citizen of the United States, residing at Chicago Heights, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Chair-Support Structures for Mining-Drills, of which the following is a specification.

One of the leading objects of the present invention is the provision ofv an improved and novel form or style of adjustable sliding chair construction for the accommodation of the boxings or bearings for miners drills or augers, regardless of the length of their trunnions, two general types of such trunnions, long and short, being in common use.

A further purpose of the invention is to do away with the necessity of using the customary, relatively-expensive, notched or re cessed bars or posts and provide a suitable adjustable sliding chair for the usual unnotched posts, capable of receiving and sup porting boxings of all kinds, regardless of -whether they have short or long trunnions or journals.

A. still further feature of the invention is the construction of such a chair in such a way that the parts provided with the bearings for the short trunnions and those equipped with the bearings for the longer trunnions will reinforce and strengthen one another so as to lessen the likelihood of damage to the device and permit its construction with a minimum of metal, but without a sacrifice of strength.

In the preferred embodiment of the invention the chair is constructed to fit channel bars with parts fitting in the channels of such bars and other parts such as straps encircling the bars, these two portions of the chair being equipped with the bearings referred to, to obtain adequate strength.

In order that those skilled in this art may have a full and complete understanding of the advantages of this invention, I have illustrated a preferred and desirable embodiment of the same in the accompanying drawing which forms a part of this specification, and throughout the various views of which like reference characters refer to the same parts.

In this drawing:

Figure 1 illustrates the construction associated with a boxing having short trunnions;

Fig. 2 shows the same construction associated with an anger boxing with longer trunnions;

Fig. 3 is a side elevation of the sliding chair showing it in position on the bars of a P Fig. 4- is a section on line 4-4 of Fig. 3, and,

Fig. 5 is a horizontal section on line 5-5 of Fig. 3.

As is customary in constructions of this general character, the supporting posts consists of two spaced upright channel-bars l0 and 11 disposed with their flanges projecting inwardly, as shown in Fig. 5. The upper and lower ends of these post side-bars are connected together by suitable castings accommodating a bottom support 12 and a threaded jack-screw 13 for the upper part, these two parts 12 and 13 being adapted to hold the post in proper position, the screw 13 being adjustable as to position, as will be rea dily understood.

The sliding chair constituting the particular feature of this invention, which is desirably cast in one piece to form a strong integral member, consists of two end or body portions 6 and 7 connected together by a cross-bar or web 1'? of such length that the portions and 7 are adapted to be positioned just inside of companion post bars 1.0 and 11.

Each of these parts 6 and Y has on one face a rib 8 adapted to fit in the inwardlyfacing channel or groove of the correspond ing bar 10 or 11, the rib being substantially the same length as the part 6 or 7 and of practically the same width as the groove. At its opposite ends each of these body-portions 6 and 7 has two straps 14: and 15 encircling the corresponding, bar 10 or 11 as the case may be. Opposite these straps the parts 6 and 7 and their ribs 8 are recessed at 22 and 23 to provide two pairs of alined or registered bearings for the reception of the trunnions of a boxing of the short trunnion type. Portions of the straps, for example, at 16, areinclined, and the bearings or recesses 22, and 23, are somewhat inclined and provided with overhanging portions 22 and 23, whereby with the employment of a minimum amount of metal these bearings are positioned directly opposite the straps for purposes of reinforcement and strength.

Stated somewhat differently, these bearings which extend through the ribs 8 are strengthened, not only by such ribs co-acting interiorly with the bars, but also by the straps or bends cooperating with the exterior of such bars. Each of these parts cooperates with the other to render the structure especially strong, it being understood that appliances of this character are subjected to relatively great strains.

In order to adjustably hold the chair in the desired position, one of the straps or bands is equipped with a threaded boss 19 accommodating a set-screw 20 with handle 21 adapted to bear against the edge of one of the bars.

Each of the straps 15 is provided with an extension 30 just outside of the upright bar and having two opposite flanges 81 and 32 overlying the flanges of the channel-bar, as is clearly shown in Fig. 5. The pair of flanges 32 are equipped with enlargements 25 provided with alined bearings 26 for the accommodation of the trunnions or journals of the style of boxing having trunnions longer than those adapted to be received in the bearings 22 and 23.

Either pair of bearings 22, 22, or 23, 23, may be used for the short trunnion boxings, depending upon whether the chair is applied to the bars as shown in Figs. 3 and 4 or whether it is reversed. In case it is desired to employ a boxing with long trunnions, these are readily received in the bearings 26, 26. It is particularly to be observed that the parts of this chair are so constructed as to reinforce and strengthen one another, permitting the employment of a relatively small amount of metal for a structure possessing adequate strength. That is to say, to compensate for the lack of the parts 30, 31, and 32 entirely encircling the bars, the ribs 8, equipped with the shorter trunnion bearings are employed to fit into the channels of the bars, all as will be readily understood, so that regardless of whether the short trunnion bearings or long trunnion bearings are being used, all parts of the structure will act to properly support the particular boxing employed.

The capacity for employment of these chairs with substantially all kinds of boxings now in use is a feature of especial im portance, because the miner upon breaking one style of boxing may readily temporarily or permanently employ one of the 7 other kinds. If, on the other hand, the

chair were so constructed as to use only one style of boxing, considerable time is lost 01'" dinarily in finding another of that special style.

It may be further remarked that this structure, as will be readily observed, is simple in construction, and it has been found to be especially effective in operation, meeting the approval of those who use devices of this character.

It is to be understood that various minor mechanical changes may be made in this device without departure from the substance of the invention and without the sacrifice of any of its substantial advantages.

I claim:

1. As an article of manufacture, a slidechair comprising two body-portions connected together by a web and adapted to be received between a pair of spaced supporting post-bars channel shape in cross-section, each of such body-portions having a rib adapted to fit in the channel of its respective bar, such body-portions and ribs being recessed in alinement to afford bearings between the post-bars for the accommodation of the trunnions of an auger-boxing, and straps integral with said body-portions adapted to inclose said post-bars in substantial register with said bearings, substantially as described.

2. As an article of manufacture of the character described, a slide-chair comprising two body-portions connected together by a web and adapted to be received between a pair of spaced supporting post-bars channelshape in cross-section, each of such bodyportions having a rib adapted to fit in the channel of its respective bar, such body-portions and ribs being recessed in alinement to afford bearings between the post-bars for the accommodation of the trunnions of an auger-boxing, and straps integral with said body-portions and adapted to inclose said post-bars in substantial register with said bearings, each of said straps having an extension adapted to overlie the outer face and an edge of its respective bar, the edge-portions of said extensions having bearings for auger-box trunnions of greater length than those adapted to be accommodated in the bearings between the bars, substantially as described.

3. As an article of manufacture of the character described, a slide-chair comprising two body-portions connected together by a web and adapted to be received between a pair of spaced supporting post-bars channel shape in cross-section, each of such bodyportions having a rib adapted to fit in the channel of its respective bar, such bodyportions and ribs being recessed in alinement to afford two pairs of bearings between the post-bars for the accommodation of'the trunnions of an auger-boxing, and a pair of straps integral with each of said body-portions and spaced apart and adapted 1,222,752 t0 inclose said post-bars in substantial regis length than those adapted to be accommoter with said bearings, one of the straps of dated in the bearings between the bar each body-portion having an extension stantially as described. adapted to overlie the outer face and the op- 1 5 posits edges of its respective post-bar, the v FRED FUNK edge-portions of said extensions having Witness: bearings for auger-b0x trunnions of greater ALVE A. BARNES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

